The plate has a reactive face (1) for supplying oxidizing gas or fuel gas to an electrode membrane assembly. The face has projecting edges (3) that define respective gas circulating channels (2). Width (O) of each channel at half-height of the correspondin...

The cell has six basic cells, each with carbon anodic and cathodic bi-polar plates (1, 2) surrounding a polymer membrane (3). Each bi-polar plate is sandwiched between two coolant cells (8) that are formed by two adjacent aluminum plates defining fluid cha...

The working gas, stored at a cryogenic temperature in a tank (3), is heated in an exchanger (6) by hot gases (7) resulting from catalytic combustion, through a catalyst bed (8), of a metered mixture of fuel gas and oxidant gas stored in tanks (10, 11). App...

An auxiliary propulsion system for a cryotechnic launch vehicle with a main nozzle (1) has a supplementary nozzle (4) connected to the fuel tank (2) via a duct containing a catalytic housing (6) between a downstream end (51) connected to the nozzle and an ...